One of the mysteries of the English language finally explained.
From eternity, from the beginning of time; from the most remote antiquity. Now somewhat rare.
Late 16th century. From post-classical Latin ab aeterno (Vulgate) from classical Latin ab from + aeternō, ablative of aeternum eternity, use as noun of neuter of aeternus eterne.
ab aeterno/ab iːˈtəːnəʊ/
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